Scientific paper

Phenology of Three Exotic Pine Bark Beetle Species (Coleoptera: Scolytidae) Colonising Pinus radiata Logs in the South-western Cape Province

Published in: South African Forestry Journal
Volume 157, issue 1, 1991 , pages: 27–31
DOI: 10.1080/00382167.1991.9629096
Author(s): G.D. Tribe,


Orthotomicus erosus (Woll.), Hylastes angustatus (Herbst) and Hylurgus ligniperda (F.) are exotic bark beetle pests of pine plantations in South Africa. Results from weekly trapping of adult beetles over a period of five years in the south-western Cape Province showed that the different species have activity peaks at different times of the year. H. angustatus is the most consistent with 95% of the beetles trapped in September and October. The O. erosus activity peak was more variable but always occurred in the summer months (October to February) when 84% of the beetles were captured. H. ligniperda was the most variable, being found in every month of the year, although an autumn peak representing 37 % of the beetles occurred in April/May. The period of lowest beetle activity was in midwinter. The use of this information in the formulation of control measures is discussed.

Get new issue alerts for South African Forestry Journal